| 摘要 |
The invention relates to a device capable of maximising the typing capability of the two index fingers. For this purpose, the number of rows is increased from 4 to 5, allowing the superimposition: group of 5 letters - finger column - colour. The essential logistic support is the "ESTA" order of decreasing frequency of the 26 letters and of their 5 groups of 5. The layout has been arranged in columns parallel with the "pyramid" in the centre of the figure containing numbers, mathematical signs and punctuation marks. Left index finger, Consonants, 52%. Right index finger, Vowels 41%. Total 93%. The device according to the invention is applicable to all keyboards. <IMAGE>
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